Combining Remote Sensing Image with DEM to identify Ancient Minqin Oasis,northwest of China
The developing and desertification process of Minqin oasis is representative in the whole arid area of northwest China.Combining Remote Sensing image with Digital Elevation Model (DEM) can produce the three-dimensional image of the research area which can give prominence to the spatial background of historical geography phenomenons distribution,providing the conditions for extracting and analyzing historical geographical information thoroughly.This research rebuilds the ancient artificial Oasis based on the three-dimensional images produced by the TM digital Remote Sensing image and DEM created using 1:100000 topographic maps.The result indicates that the whole area of the ancient artificial oasis in Minqin Basin over the whole historical period reaches 321km2,in the form of discontinuous sheet,separated on the two banks of ancient Shiyang River and its branches,namely,Xishawo area,west to modern Minqin Basin and Zhongshawo area,in the center of the oasis.Except for a little of the ancient oasis unceasingly used by later people,most of it became desert.The combination of digital Remote Sensing image and DEM can integrate the advantages of both in identifying ancient oasis and improve the interpreting accuracy greatly.
Digital Remote Sensing image Digital Elevation Model (DEM) Minqin Basin Ancient Oasis Rebuild
XIE Yaowen
Key Laboratory of Western Chinas Environment System (Ministry of Education);Lanzhou University,Lanzhou 73000,China
国际会议
第16届国际地理信息科学与技术大会(16th International Conference on GeoInformatics and the Joint Conference)
广州
英文
2008-06-28（万方平台首次上网日期，不代表论文的发表时间）